Which of the following situations of altered perfusion could be triggered by chronic obstructive pulmonary disease?
Ventilation perfusion mismatching
Impaired cardiac output
Impaired circulation
Excessive cardiac demand
The Correct Answer is A
A. In chronic obstructive pulmonary disease (COPD), airflow obstruction leads to ventilation-perfusion (V/Q) mismatching. This means that some parts of the lungs may receive air but not enough blood flow, or vice versa, resulting in inefficient gas exchange and reduced oxygenation. This is a hallmark of COPD.
B. While COPD can eventually affect the heart, particularly leading to right heart failure (cor pulmonale), it does not directly impair cardiac output in the early stages. The primary issue in COPD is with lung function.
C. COPD does not directly impair circulation but can lead to pulmonary hypertension and strain on the circulatory system over time. However, impaired circulation is not the primary issue triggered by COPD.
D. COPD may lead to increased work of breathing, but it does not directly cause excessive cardiac demand in the same way that conditions like anemia or sepsis might.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Increased chloride levels, also known as hyperchloremia, can occur in metabolic acidosis as part of the body's attempt to balance acid-base status.
B. All of the options listed contribute to metabolic acidosis. Increased metabolic acids, decreased bicarbonate, and increased chloride levels can all be present in metabolic acidosis, making this the correct answer.
C. Increased metabolic acids, such as lactic acid or ketoacids, are a key feature of metabolic acidosis.
D. In metabolic acidosis, bicarbonate levels decrease as the body compensates by buffering excess acid with available bicarbonate.
Correct Answer is B
Explanation
A. Both Hodgkin lymphoma (HL) and non-Hodgkin lymphoma (NHL) can cause lymph node enlargement in various locations, including the neck. The location of the lymph nodes alone does not differentiate between the two types of lymphoma.
B. The presence of Reed-Sternberg cells is a hallmark of Hodgkin lymphoma. These abnormal cells are typically found in the lymph nodes of patients with HL and are a key diagnostic feature.
C. Hodgkin lymphoma is more common in young adults and older adults, but it can occur at any age. Non-Hodgkin lymphoma has a broader age distribution and can affect individuals of all ages, so age alone is not a distinguishing factor.
D. Both Hodgkin and non-Hodgkin lymphoma can spread to the spleen, liver, and bone marrow, so the spread of disease alone is not specific to either type of lymphoma. The presence of Reed-Sternberg cells is the key diagnostic feature for Hodgkin lymphoma.
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